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数学
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解方程2x²-3(x-3)²=6
人气:321 ℃ 时间:2020-03-30 22:16:22
解答
2x^2-3(x-3)^2=6
2x^2-3(x^2-6x+9)=6
2x^2-3x^2+18x-27=6
-x^2+18x-33=0
x^2-18x+33=0
(x-9)²=81-33=48
x-9=±4√3
x=9±4√3
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